freeman



No. 608,768. Patented Aug. 9, I898. W. P. FREEMAN.

ELECTRODYNAIIIC APPARATUS FOR OPERATING CLIPPING, BRUSHING, OR OTHER MECHANISMS.

(Application filed Aug. 12, 1897.)

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No. 608,768. Patented Aug. 9, I898.

W. P. FREEMAN.

ELECTRODYNAIMC APPARATUS FOR OPERATING CLIPPING. BRUSHING. OR OTHER MECHANISMS.

(Application filed Aug 12. 1897.) (N0 Modei.) 2 Sheets-Sheet 2 ava 0551;

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UNITED STATES PATENT OFFICE.

\VARREN 1. FREEMAN, OF NFAV YORK, N. Y., ASSIGNOR TO ROBERT J. CAMPBELL, OF SAME PLACE, AND FRANCIS LARKIN, JR., OF SING SIN G, NEXV YORK.

ELECTRODYNAMIC APPARATUS FOR OPERATING CLiPPING, BRUSHING, OR OTHER MECHANISMS.

SPECIFICATION forming part of Letters Patent No. 608,768, dated August 9, 1898.

Application filed August 12, 1897.

To all whom it may concern:

Be it known that I, WARREN P. FREEMAN, of the city, county, and State of New York, have invented certain new and useful Improvements in Electrodynamic Apparatus for Operating Clipping, Brushing, or other Mechanisms, of which the following is a description, referring to the accompanying drawings, which form a part of this specification.

My invention contemplates the production of an electrically-operated motor arranged to form a handle and suitable means for supporting and operating various kinds of tools or instruments, such as horse-clippers, horsebrushing apparatus, and various other attachments.

The invention is of such a nature that it will be readily understood by a description of one preferred embodiment, as illustrated in the accompanying drawings.

Figure 1 is a side elevation of a complete horse-clipping instrument constructed under my invention. Fig. 2 shows a rotary brush, partly in section, and the manner of connecting it to my handle for applying power thereto. Fig. 3 isa plan view, partly broken away to show details of the complete instrument shown in Fig. 1. Fig. at is a cross-section through the armature and the field-magnet poles on the plane A at of Fig. Fig. 5 is a cross-section on the plane X X of Fig. 3. Fig. 6 is a partial longitudinal section on the plane 0 6 of Fig. 5. Fig. 7 is a side View of part of the field-1nagnet, and Fig. 8 is an end view 01": the same.

Throughout the drawings like letters of reference indicate like parts.

The handle portion of my apparatus contains a complete electrical motor, the fieldmagnet B B G O of which forms the inclosed casing 13 B O of elongated cylindrical shape. The rotary shaft D of the motor projects from the end of this casing and has upon its end the eccentrically-placed pin E. hen the motor is used to actuate a rotary brush, as shown in Fig. 2, a brush F is provided with a socket G, adapted to fit over the end of the shaft D and be retained thereon by the setscrew Ii. The eccentric-pin E may enter a the motor-shaft D.

Serial No. 647,939. (No model.)

recess in the socket G and so insure the re" tation of the brush by means of the shaft; but the set-screw H is quite sufficient for this purpose without employing the cccentricpin E. The function of the eccentric-pin E is to actuate the cutter J, Figs. 1 and 3, reciprocally upon the cutter-bar K for clipping horses or, indeed, for clipping generally. 13y mere difference in the scale and in details which are well understood the apparatus may be modified for trimming grass and, indeed, a vast variety of uses. The cutter-bar K in one or more parts forms the base and support of the clipping attachment. The whole attachment may be secured to the end of the casing B O by means of the disk or plate L, secured to or forming part of the clipping attachment, and readily attached to the end of the casing B B" O by a screw-stud M and setscrew P. The stud M preferably extends from the plate L into the brass or other nonmagnetic plate R, which forms the end of the casing of the motor and provides bearings for Thereciprocation of the knives or cutter is accomplished by the pitrnan-link S, pivoted at one end to the reciprocating cutter-plate .l and at the other end to the eccentric-pin E. The rotation of the shaft D therefore causes the reciprocation of the cutters J. The requisite amount of pressure between the cutter-bar K and the knives or cutters J is produced at will by the spring T and thumb-nut U. These details will be well understood by those familiar with clipping instruments.

Turning now to the electric motor and its mounting in the cylindrical tool handle or casing which forms its field-magnet, the shaft D carries the armature V of any desired type. I have indicated an eight -po1e laminated armature-core, which may be wound in any approved manner. The armature'shaft has bearings in the non-magnetic disk R and in the magnetic plate TV, which forms part of the field-magnet iron O XV O, Figs. 7 and S. The field-magnet coil X is wound around the cylindrical core 0, which is cast in one piece with the pole O, as indicated in Figs. 3 and 7. This core 0 forms a continuation of the pole piece 0, so that the current flowing in the coil X excites the pole O. The portion B of the casing surrounds the coil X closely, as shown. The disk Z, which may be part of the core 0 and is of course, like the whole field-magnet circuit, of magnetic material, connects the core 0 with the external magnctic casing B B. The casing B B may be screwed to the disk Z, as shown at z, and to the non-magnetic disk R, as shown at r. The part of the casing which forms the other pole C of the motor may also be secured to the disk R in the same manner by screws r. The casing B is cut away, as clearly shown in Fig. 1, so as to form the pole, B, opposed to the pole O and separated therefrom by an airspace at all points and held separated by means of the non-magnetic disk R. Upon the plate XV may be supported the brush: holders, which may consist of small slotted posts '10, through which the brushes 10 extend against the commutator o. The brushes may be held against the commutator by springs w". The posts w are of course insulated, and the current may be supplied by connecting them to the leading-in wires A in shunt with the field-magnet coil, though it is of course immaterial to the present invention what style of electric connection is employed. The most convenient manner for introducing the leading-in wires A is through an end cap Y and disk Z at the rear end of the handle, though I do not mean to limit my invention to this. For this purpose the core 0 is bored lengthwise, and the wires may be brought out in convenient proximity to the brushholders through the hole 0, Fig. 7.

To replace the clipping attachment by the brush I it is only necessary to disconnect the clipper by means of the screw P and to mount the brush F on the end of the shaft D, securing it by the set-screw H. In using the instrument it may be grasped firmly by both hands, the electrical parts being thoroughly protected within the field-magnet casin g B O. Preferably the handle will be covered with leather, and the interval between the polescrewing the screws and 0' the portion B of the casing may be slipped off, entirely exposing the field-magnet windings and one side of the armature, making examination and repairing very simple.

Having now fully set forth my invention in one of its preferred forms without attemptin g to enumerate many obvious modifications which may be made without departing from the principles thereof, as will be fully understood by those skilled in the art, I claim, and desire to secure by these Letters Patent, the following:

1; The electrically-actuated clipping mechanism, combining the armature and shaft, the pole-pieces forming in part a protective easing for the said armature, a non-magnetic disk or plate secured to the ends of the polepieces and supporting the armature-shaft,the stationary parts of the said clipping mechanism secured to said non magnetic disk or plate, an eccentrically-placed pin upon said shaft and a pitman connecting said pin with the reciprocating parts of said clipping 1n echanism, substantially as set forth.

2. The portable electric motor, the fieldmagnet of which forms a casing within which the operating parts are contained, and from which the rotary end of the shaft projects, a elippin g mechanism, means'for attaching the stationary parts of the saidlmechanism to the stationary parts of the said motor, the cutters of said mechanism sliding in guides upon the said stationary parts, and a pitman pivoted eccentrically at one end to said shaft and pivoted at its other to the said cutters, substantially as set forth.

3. In combination in a combined electric motor and instrument-handle, the field-magnet coil X, the core C upon which the said coil is wound, the pole-piece G magnetically connected with one end of the said core, the magnetic casing and second pole-piece magnetically connected with the other end of the said core and surrounding the said coil, and

armature, commutator, brushes, and projectin g armature-shaft; whereby a brush, clipper or other instrument may be conveniently mounted upon and actuated by the said motor, substantially as set forth.

In witness whereof I have hereunto set my hand this 9th day of August, 1897.

WARREN P. FREEMAN.

Witnesses:

Ron'r. J. CAMPBELL, HAROLD BINNEY. 

